1 /* Test of rounding towards zero.
2 Copyright (C) 2007-2008 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Bruno Haible <bruno@clisp.org>, 2007. */
28 #include "isnanl-nolibm.h"
30 #define ASSERT(expr) \
35 fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
42 /* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
43 So we use minus_zero instead.
44 Note that the expression -LDBL_MIN * LDBL_MIN does not work on other
45 platforms, such as when cross-compiling to PowerPC on MacOS X 10.5. */
46 #if defined __hpux || defined __sgi
47 long double minus_zero = -LDBL_MIN * LDBL_MIN;
49 long double minus_zero = -0.0L;
55 DECL_LONG_DOUBLE_ROUNDING
57 BEGIN_LONG_DOUBLE_ROUNDING ();
60 ASSERT (truncl (0.0L) == 0.0L);
61 ASSERT (truncl (minus_zero) == 0.0L);
62 /* Positive numbers. */
63 ASSERT (truncl (0.3L) == 0.0L);
64 ASSERT (truncl (0.7L) == 0.0L);
65 ASSERT (truncl (1.0L) == 1.0L);
66 ASSERT (truncl (1.5L) == 1.0L);
67 ASSERT (truncl (1.999L) == 1.0L);
68 ASSERT (truncl (2.0L) == 2.0L);
69 ASSERT (truncl (65535.999L) == 65535.0L);
70 ASSERT (truncl (65536.0L) == 65536.0L);
71 ASSERT (truncl (2.341e31L) == 2.341e31L);
72 /* Negative numbers. */
73 ASSERT (truncl (-0.3L) == 0.0L);
74 ASSERT (truncl (-0.7L) == 0.0L);
75 ASSERT (truncl (-1.0L) == -1.0L);
76 ASSERT (truncl (-1.5L) == -1.0L);
77 ASSERT (truncl (-1.999L) == -1.0L);
78 ASSERT (truncl (-2.0L) == -2.0L);
79 ASSERT (truncl (-65535.999L) == -65535.0L);
80 ASSERT (truncl (-65536.0L) == -65536.0L);
81 ASSERT (truncl (-2.341e31L) == -2.341e31L);
82 /* Infinite numbers. */
83 ASSERT (truncl (1.0L / 0.0L) == 1.0L / 0.0L);
84 ASSERT (truncl (-1.0L / 0.0L) == -1.0L / 0.0L);
86 ASSERT (isnanl (truncl (0.0L / 0.0L)));